Wrench



H. SMITH, 111. I I wasmcn. APPLICATION FILED MAY 2], I920- RENEWEDSEPT-2 1, 192l- TTORNEYS.

UNlTED STATES PATENT QFHQE.

HUNTER SMITH, JR., OF SEATTLE, WASHINGTON, ASSIGNOR 0F ONE-HALF T0 JAMES'l. LA'WLER, 0F SEATEE, WASHINGTON.

WRENCH.

Application filed May 21, 1920, Serial No. 383,145.

' T 0 alt whom 2'15 may concern:

.Be it known that I, HUNTER SMITH, J12, a citizen of the United States,residing at Seattle, in the county of King and State of Washington, haveinvented new and useful Improvements in renches, of which the followingis a specification.

This invention relates to a wrench and has for its primary object theconstruction of a wrench in which the parts are so associated that anadjustment can be more readily accomplished and further, gripping actionwill be in proportion to the pressure necessary to turn the wrench,thereby preventing the wrench from slipping.

An object of the invention is the associa tion of parts so as tomaterially increase the gripping action of the wrench with the objectacted upon.

A feature of the invention is the novel manner of arrangin the cammember and actuating same so t at great pressure can be brought to bearbetween the jaw and object acted upon. a

With these and other objects in view the invention will be betterunderstood from the following detailed description taken in connectionwith the accompanying drawing wherein:

Figure l is a side elevation of a wrench constructed in accordance withmy invention.

Fig. 2 is an edge elevation.

Again referring to the drawing illustrating one construction of myinvention the numeral 1 designates a stationary jaw having a shankextension 2 which in turn is provided with spaced projections 3 and alsowith an opening t. The jaw is further provided with an arcuate series ofgripping teeth 5. Pivotally connected to the jaw 1 is the plate 6 whichis arranged in place when the wrench is used on soft material to preventmarring.

Slidably supported on the shank 2 is the movable jaw 7 that has a pin 8passing through the opening 4: and engaged by spring 9 in the opening.From this construction it will be seen that under normal conditions themovable jaw is forced away from the stationary jaw.

The jaw 7 is provided with a groove 10 which is engaged by thecylindrical portion of the cam member 11. This cam member is arrangedbetween the projections 3 and Specification of Letters Patent.

Patented Nov. 15, 1921.

Renewed September 24', 1921. Serial No. 503,119.

pivoted thereto as indicated at 12. Thus it will be seen that theco-action between the projections, walls of the groove 10 and the cammember will substantially hold the latter from being forced out ofplace- This cam member is provided with an arm 13 supporting a roller14. This roller is constantly engaged by the cam 15 projecting from ahandle 16 that is pivotally connected to the shank as indicated at 17.

From the foregoing description taken in connection with the accompanyingdrawing it will be apparent that I provide a wrench of few partssubstantially associated and capable of making a quick connection andincreasing its gripping effect with the object in proportion to thepressure necessary to turn the wrench. a

It is, of course, to be understood that the invention may be constructedin various other manners and the parts associated in diflerent relationsand, therefore, I do not care to be limited in any manner except as setforth in the claims hereunto appended.

Having thus described my invention what I claim is:

1. A wrench comprising a stationary jaw, a plate pivoted thereto, ashank extending from the jaw, a movable jaw mounted on the shank, aspring arranged to force the movable jaw in one direction, a cam memberpivoted to the shank, and a handle pivoted to the shank and constructedto force the said cam member to move the said movable jaw against actionof said spring.

2. A wrench comprising a stationary jaw, a shank extending therefrom, amovable jaw mounted on the shank, a spring arranged between the jaws formoving the same apart, a pivoted cam for actuating the movable jawagainst the action of said spring, a handle pivoted at one end to theshank and having a cam action with said cam.

3. A wrench comprising a stationary jaw, a shank extending therefrom, amovable jaw mounted on the shank, a spring arranged between the jaws formoving thesame apart, a pivoted cam for actuating the movable jawagainst the action of said spring, a handle pivoted at one end to theshank, a roller carried by said cam and a cam on said handle for actionagainst said roller.

in testimony whereof I affix my signature.

HUNTER SMITH, JR.

